From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Engine vibrations on the Goshawk II, investigating crank chamber strengthening and flywheel clearance.
| Identifier | ExFiles\Box 74\3\ scan0260 | |
| Date | 20th February 1922 | |
| To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to BY.{R.W. Bailey - Chief Engineer} c. to Ds. c. to EP.{G. Eric Platford - Chief Quality Engineer} X4221 E1/M20.2.22. GOSHAWK II. ENGINE VIBRATIONS. X.4221. Further to memo. R1/M18.2.22., Mr. Royce would like you to watch the behaviour of the main flywheel, and see if this indicates whether the crank chamber is moving or not. It has been noted now that Goshawk 1. crank chamber is like the Condor, and would not suffer from weakness in bending sideways due to being a complete beam. We are at the present moment investigating in what way the design should be altered to strengthen the crank chamber sideways either by completing the web system in the bottom half or by adding side flanges to the top half like the Hawk or the 40/50. There is also the question of the clearance between the slipper flywheel and the camshaft gearwheel. When the chassis is on the dynamometer, the .1 would be reduced to about .065". Can you do with a slightly narrower slipper wheel or shall we have to push the fan drive forward a little to get more clearance at this point. E.{Mr Elliott - Chief Engineer} | ||